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Mart · 09-07-2021, 04:50 AM

I oiled a speedo cable once, and it did not help. I then greased it and it did help. I think the grease acts as a damper of sorts and damps down the fast/slow action.
The fast/slow action is normally generated at a kink in the cable so check the routing. Also check it is not close to the exhaust at any point.
Mart.

09-07-2021, 04:50 AM	#7
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 9,240	Re: Erratic speedo up to about 30mph I oiled a speedo cable once, and it did not help. I then greased it and it did help. I think the grease acts as a damper of sorts and damps down the fast/slow action. The fast/slow action is normally generated at a kink in the cable so check the routing. Also check it is not close to the exhaust at any point. Mart.